Vehicle Function Triggering via Mobile Authorization and Sensor Gating
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Solution Overview
Problem
Existing keyless-entry systems for vehicles are vulnerable to unauthorized access as remote control signals can be intercepted and amplified, allowing third parties to unlock vehicles without the owner's knowledge.
Innovation Solution
A method and system that utilize a wireless connection between a mobile device and an electronic controller in a vehicle, where the controller prompts the mobile device to transmit access permission only after user authorization and sensor device activation, ensuring secure triggering of vehicle functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If keyless-entry systems use periodic low-power signals from remote control, then user convenience is improved, but security deteriorates due to signal interception and amplification vulnerabilities
Solution Approach 1:
The system performs preliminary actions by having the controller continuously transmit challenge signals before actual access is granted. The mobile device must respond with correct authentication codes before the locking mechanism is activated, preventing unauthorized access while maintaining convenience
Solution Approach 2:
A cryptographic authentication protocol acts as an intermediary between the remote control and the controller. Instead of direct signal transmission, the system uses encrypted challenge-response sequences with rolling codes that prevent interception and amplification attacks
2Speed
If the controller constantly listens for signals from the remote control, then access response time is improved, but energy consumption increases
Solution Approach 1:
Instead of continuous listening, the controller transmits challenge signals at periodic intervals and the mobile device responds only when needed. This reduces the overall energy consumption while maintaining fast access response times when the user approaches the vehicle
3Reliability
If the mobile device transmits access permission only after user authorization, then security is improved, but operation complexity increases
Solution Approach 1:
The mobile device automatically manages the authentication process without requiring user intervention. The device stores authorization status locally and automatically responds to controller challenges, eliminating the need for users to manually input codes or perform complex actions
Data Source
AI summary
A method is for activating a vehicle function, wherein a controller for activating the vehicle function checks an access authorization of the mobile device and activates the vehicle function only if the authorization is acceptable. The method includes: a) the controller sending a request to the mobile device demanding transmission of the authorization for a vehicle function, b) the mobile device receiving the request from the controller and sending the authorization to the controller, c) the controller checking the authorization and activates the vehicle function if the authorization is acceptable, d) the mobile device sending the authorization only if the device was previously actuated for the purpose of authorization and thus was authorized to send the authorization, e) and the controller activating the vehicle function only if a signal of a sensor device actuatable by the user has previously been received by the controller.